petsc-3.13.6 2020-09-29
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PetscDTGaussQuadrature

create Gauss-Legendre quadrature

Synopsis

#include "petscdt.h" 
PetscErrorCode PetscDTGaussQuadrature(PetscInt npoints,PetscReal a,PetscReal b,PetscReal *x,PetscReal *w)
Not Collective

Input Arguments

npoints - number of points
a - left end of interval (often-1)
b - right end of interval (often +1)

Output Arguments

x - quadrature points
w - quadrature weights

References

1. -Golub and Welsch, Calculation of Quadrature Rules, Math. Comp. 23(106), 1969.

See Also

PetscDTLegendreEval()

Level

intermediate

Location

src/dm/dt/interface/dt.c

Examples

src/ksp/ksp/tutorials/ex74.c.html

Index of all DT routines
Table of Contents for all manual pages
Index of all manual pages